EP0491802B1 - Printing roll core - Google Patents
Printing roll core Download PDFInfo
- Publication number
- EP0491802B1 EP0491802B1 EP90913908A EP90913908A EP0491802B1 EP 0491802 B1 EP0491802 B1 EP 0491802B1 EP 90913908 A EP90913908 A EP 90913908A EP 90913908 A EP90913908 A EP 90913908A EP 0491802 B1 EP0491802 B1 EP 0491802B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- sleeve
- valve
- passages
- printing roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007639 printing Methods 0.000 title claims abstract description 21
- 230000009969 flowable effect Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
- B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
Definitions
- This invention relates to a printing roll core for a printing roll comprising such a core and one or more sleeves which are provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core.
- Printing roll cores of the above mentioned type are known since long and are extensively used within the graphic industry. For example may be mentioned those printing roll core designs which are described in US-A-3 146 709 and GB-A-1 581 232.
- a drawback of these known printing roll cores is that compressed air is flowing out through all the outlets in the surface of the core when the sleeve is being mounted on the core or is being removed from it.
- this known system shall function it has therefore been necessary to concentrate the majority of the outlets to a region of the surface of the core adjacent to that end of the core where the mounting operation is initiated, while only one single outlet is located at the central part of the surface of the core.
- the purpose of the invention is to provide an improved printing roll core, in which the above mentioned drawbacks and limitations have been eliminated in a simple way.
- a printing roll core has been generally designated 1. It consists according to the embodiment of a cylindrical shell 2 (also a slightly tapered core may be conceived) and two end portions 3 and 4 provided with axle bars 5 and 6.
- the cylindrical outer surface of the shell 2 has been designated 7.
- Compressed air can be supplied from a source of compressed air through a compressed air hose 9 via a connection nozzle 8 in axle bar 5.
- hose 9 there may optionally be provided a valve for opening and closing the connection.
- the supply of compressed air may be effected either by opening the valve 10 or by connecting the mouth piece 11 of hose 9 to the connection nozzle 8 of the axle bar 5. When closing the supply the operation is reverse.
- a fill body 12 of rigid cellular plastic material which reduces the air volume in the interior of the core to the thin gaps between on one side the shell 2 and the end portions 3 and 4, and on the other side the said fill body 12.
- valve 14 is a ball valve of well known type, as is shown in Fig. 1A.
- valve seat 15 having an outer annular border line which essentially coincides with the outer surface 7 of the shell.
- a steel ball 17 is pressed towards the seat 15 by means of a spring 18. In the closing position of the valve the ball 17 extends beyond the outmost part of the valve seat 15 and also beyond the outer surface of the shell 2 by an outer portion 19 which has the shape of a spherical calotte.
- the sleeve - or the sleeves - which shall be mounted on the printing roll core 1 may be designed in a manner per se and consist of an inner shell 20 of reinforced plastics and an outer tube 21 of rubber with an exterior cliché.
- the sleeve has been generally designated 22, Fig. 2.
- the compressed air hose 9 is connected to the nozzle 8, and the valve 10 is opened so that the interior of the core is subjected to an overpressure. No air, however, can flow through the passages 13a-13h as the valves 14 are closed.
- the sleeve 22 is mounted, starting in the right hand portion of the core 2, which portion in this case is the initial mounting end.
- the end portion 23 therefore suitably is somewhat tapered in order to facilitate the initial mechanical mounting operation.
- the sleeve 22 will with its interior side press the balls 17 of the valves 14 into the passages 13a under compression of spring 18.
- the valves are opened in a manner known per se and air flows out through the outlets of these first passages 13a such that the sleeve 22 will be expanded to a sufficient degree in order that it readily may be further moved over the core 2.
- the other valves 14, i.e. the valves in passages 13b-13h are still closed but they will successively be opened as they are covered by the sleeve 22 during the continued movement of the sleeve along the core 2.
- Fig. 3 illustrates the case when a plurality of sleeves 22a, 22b, 22c, and 22d are mounted on a core 1. This may be made without problems according to the invention as the shell 2 of the core 1 may be provided with a plurality of valve provided passages 13a-13h. These has been indicated in Fig. 1 only by an X. It is also possible according to the invention to provide only one or a couple of comparatively short sleeves on a comparatively long core 1, so that the sleeves only will cover a minor portion of the core, a possibility which sometimes is worthwhile.
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Liquid Developers In Electrophotography (AREA)
- Winding Of Webs (AREA)
- Ink Jet (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
- This invention relates to a printing roll core for a printing roll comprising such a core and one or more sleeves which are provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core.
- Printing roll cores of the above mentioned type are known since long and are extensively used within the graphic industry. For example may be mentioned those printing roll core designs which are described in US-A-3 146 709 and GB-A-1 581 232. A drawback of these known printing roll cores is that compressed air is flowing out through all the outlets in the surface of the core when the sleeve is being mounted on the core or is being removed from it. In order that this known system shall function it has therefore been necessary to concentrate the majority of the outlets to a region of the surface of the core adjacent to that end of the core where the mounting operation is initiated, while only one single outlet is located at the central part of the surface of the core. The reason for this that the sleeve already initially shall be caused to cover the majority of the outlets through which compressed air is caused to flow out since the fall of pressure otherwise would be so large that the sleeve would not be able to be sufficiently expanded. This compromise, however, means that a plurality of sleeves cannot be mounted side by side on one and the same core, which is a serious limitation since it is often desirable to make a plurality of printings side by side in one and the same printing unit. Another drawback is that a sleeve which by mistake has been displaced so far along the core that it has passed the central outlet will be locked on the core without any possibility to be released.
- The purpose of the invention is to provide an improved printing roll core, in which the above mentioned drawbacks and limitations have been eliminated in a simple way. These and other objectives may be achieved therein that the invention is characterized by what is stated in the appending claims.
- Further characteristic features, aspects and advantages of the invention will be apparent from the following description of a preferred embodiment.
- In the following description of a preferred embodiment reference will be made to the accompanying drawings, in which
- Fig. 1
- is a longitudinal sectional view through a printing roll core according to the invention;
- Fig. 1A
- shows an encircled detail of Fig. 1 at a larger scale;
- Fig. 2
- shows the same printing roll core as in Fig. 1 with a sleeve partly mounted on the core; and
- Fig. 3
- shows a printing roll core with a plurality of sleeves mounted side by side on the core.
- A printing roll core has been generally designated 1. It consists according to the embodiment of a cylindrical shell 2 (also a slightly tapered core may be conceived) and two
end portions 3 and 4 provided withaxle bars shell 2 has been designated 7. Compressed air can be supplied from a source of compressed air through acompressed air hose 9 via aconnection nozzle 8 inaxle bar 5. Inhose 9 there may optionally be provided a valve for opening and closing the connection. The supply of compressed air may be effected either by opening thevalve 10 or by connecting themouth piece 11 ofhose 9 to theconnection nozzle 8 of theaxle bar 5. When closing the supply the operation is reverse. In the interior of theprinting roll core 1 is afill body 12 of rigid cellular plastic material which reduces the air volume in the interior of the core to the thin gaps between on one side theshell 2 and theend portions 3 and 4, and on the other side the saidfill body 12. - In the
shell 2 there are in a manner known per se provided a number ofpassages nonreturn valve 14. More particularly thevalve 14 is a ball valve of well known type, as is shown in Fig. 1A. In thepassage 13a there is provided a valve seat 15 having an outer annular border line which essentially coincides with theouter surface 7 of the shell. A steel ball 17 is pressed towards the seat 15 by means of aspring 18. In the closing position of the valve the ball 17 extends beyond the outmost part of the valve seat 15 and also beyond the outer surface of theshell 2 by an outer portion 19 which has the shape of a spherical calotte. - The sleeve - or the sleeves - which shall be mounted on the
printing roll core 1 may be designed in a manner per se and consist of aninner shell 20 of reinforced plastics and anouter tube 21 of rubber with an exterior cliché. The sleeve has been generally designated 22, Fig. 2. When thesleeve 22 shall be mounted on thecore 2 thecompressed air hose 9 is connected to thenozzle 8, and thevalve 10 is opened so that the interior of the core is subjected to an overpressure. No air, however, can flow through thepassages 13a-13h as thevalves 14 are closed. Thesleeve 22 is mounted, starting in the right hand portion of thecore 2, which portion in this case is the initial mounting end. Theend portion 23 therefore suitably is somewhat tapered in order to facilitate the initial mechanical mounting operation. When thesleeve 22 thus has been mounted so far that it has passed thetapered portion 23, thesleeve 22 will with its interior side press the balls 17 of thevalves 14 into thepassages 13a under compression ofspring 18. Herein the valves are opened in a manner known per se and air flows out through the outlets of thesefirst passages 13a such that thesleeve 22 will be expanded to a sufficient degree in order that it readily may be further moved over thecore 2. Theother valves 14, i.e. the valves inpassages 13b-13h, are still closed but they will successively be opened as they are covered by thesleeve 22 during the continued movement of the sleeve along thecore 2. - Fig. 3 illustrates the case when a plurality of
sleeves core 1. This may be made without problems according to the invention as theshell 2 of thecore 1 may be provided with a plurality of valve providedpassages 13a-13h. These has been indicated in Fig. 1 only by an X. It is also possible according to the invention to provide only one or a couple of comparatively short sleeves on a comparativelylong core 1, so that the sleeves only will cover a minor portion of the core, a possibility which sometimes is worthwhile.
Claims (3)
- Printing roll core (1) for a printing roll of the type which includes a sleeve (22) mountable on the core from one end thereof and displaceable along the core to and from working positions on the core by means of compressed air flowable through passages (13a-13h) terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air does not flow through said outlets, is expandable by means of air flowing through said outlets, wherein the sleeve is displaceable along the core,
characterized in that means are provided for the connection of the said passages to a source of compressed air, said source of air being common for said passages, that a valve (14) is provided in each of said passages, and that each such valve includes an opening member (17, 19) having a outer portion (19) extending beyond the outer surface (7) of the exterior portion (2) of the core when the valve is closed and said outer portion is in its outer position, said outer portion being displaceable through outer mechanical action from said outer position to an inner position essentially interior of or coinciding with the outer surface of the core, said valve being closed when said outer portion is in its outer position and open when the outer portion is in its inner position, wherein, when the valve is open, air can flow out through the opening in the surface of the core. - Printing roll core according to claim 1, characterized in that the valves consist of ball valves, said outer portion consisting of a portion of the ball.
- Printing roll core according to claim 1, characterized in that in the interior of the core there is provided a fill body (12) which reduces the air volume of the core to a space between on one side the shell and the two end portions (3, 4) of the core and on the other side said fill body (12).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8903004 | 1989-09-13 | ||
SE8903004A SE466190B (en) | 1989-09-13 | 1989-09-13 | TRYCKVALSKAERNA |
PCT/SE1990/000568 WO1991004155A1 (en) | 1989-09-13 | 1990-09-06 | Printing roll core |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0491802A1 EP0491802A1 (en) | 1992-07-01 |
EP0491802B1 true EP0491802B1 (en) | 1995-01-11 |
Family
ID=20376863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90913908A Expired - Lifetime EP0491802B1 (en) | 1989-09-13 | 1990-09-06 | Printing roll core |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0491802B1 (en) |
AT (1) | ATE116903T1 (en) |
AU (1) | AU6410990A (en) |
DE (1) | DE69016034T2 (en) |
SE (1) | SE466190B (en) |
WO (1) | WO1991004155A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10306196B3 (en) * | 2003-02-13 | 2004-10-07 | Windmöller & Hölscher Kg | Ink transfer roller |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9101235L (en) * | 1991-04-23 | 1992-10-24 | Miller Graphics Ab | DEVICE FOR PRINTING |
GB2349897A (en) * | 1999-05-12 | 2000-11-15 | Arjo Wiggins Fine Papers Ltd | Means for removing texturing press roller sleeve |
US7107907B2 (en) | 2001-01-22 | 2006-09-19 | Goss International Americas, Inc. | Flow-restricted printing cylinder for a removable printing sleeve |
DE102008022635A1 (en) * | 2008-05-08 | 2009-11-12 | Manroland Ag | Web Press |
DE102009023170B4 (en) * | 2009-05-29 | 2013-09-05 | Wetzel Gmbh | Sleeve and method for mounting such on a support roller |
BE1027278B1 (en) * | 2019-05-15 | 2020-12-15 | Hannecard Nv | ROLL CORE AND APPLICATOR ROLL WITH INTERCHANGEABLE ROLLER SHELL |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE403454B (en) * | 1977-05-26 | 1978-08-21 | Tetra Pak Int | DEVICE FOR MIXING CLICHES ON A PRESSURE ROLLER BY VACUUM |
SE436717B (en) * | 1980-11-04 | 1985-01-21 | Olov Orjan Johnsson | A roller with exchangeable outer casing |
-
1989
- 1989-09-13 SE SE8903004A patent/SE466190B/en not_active IP Right Cessation
-
1990
- 1990-09-06 WO PCT/SE1990/000568 patent/WO1991004155A1/en active IP Right Grant
- 1990-09-06 AU AU64109/90A patent/AU6410990A/en not_active Abandoned
- 1990-09-06 AT AT90913908T patent/ATE116903T1/en not_active IP Right Cessation
- 1990-09-06 DE DE69016034T patent/DE69016034T2/en not_active Expired - Fee Related
- 1990-09-06 EP EP90913908A patent/EP0491802B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10306196B3 (en) * | 2003-02-13 | 2004-10-07 | Windmöller & Hölscher Kg | Ink transfer roller |
Also Published As
Publication number | Publication date |
---|---|
ATE116903T1 (en) | 1995-01-15 |
EP0491802A1 (en) | 1992-07-01 |
AU6410990A (en) | 1991-04-18 |
DE69016034T2 (en) | 1995-06-01 |
DE69016034D1 (en) | 1995-02-23 |
SE466190B (en) | 1992-01-13 |
SE8903004L (en) | 1991-03-14 |
WO1991004155A1 (en) | 1991-04-04 |
SE8903004D0 (en) | 1989-09-13 |
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